Filter



(No Model.)

H. J. ROBERTSON.

FILTER.

Patented Fe 1, 1898.

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UNITED STATES PATENT rarest RONALD J. ROBERTSON, OF CHELSEA, MASSACHUSETTS.

FILTER.

SPECIFICATION forming part of Letters Batent No. 598,1 15, dated February 1, 1898.

Application filed April 24:, 1 7- To all whom it may concern.-

Be it known that I, RONALD J. ROBERTSON,

a subject of Queen Victoria, residing at Chelsea, in the county of'Suffolk anclState of Massachusetts, have invented a certain new and useful Improvement in Filters, of which the following is a specification.

My invention relates to a new and useful improvement in filters, and has for its object to provide a cheap, simple, and efiective device by means of which water or other liquids may be filtered of all mechanical impurities, and to a certain extent from chemical impurities; and a further object is to so construct a filter as to render it reversible, thereby brin ging about its cleansing automatically, and an incidental object of my improvement is to adapt it for household purposes and render its manipulations so simple that a person of little or no mechanical skill may apply and use the same.

It is a well-established fact that the best agent of filtration is the deposit from the water itself, and as this deposit is often largely organic matter and usually contains a large number of animalculze of such a character as to absorb and neutralize chemical impurities as well as diseased germs, as those organisms exist in all putredinous matter, then it is only necessary to provide proper means for separating this foreign matter from the first water which passes through the filter, to thereafter purify the water bot-h mechanically and to a large extent chemically. All of these objects I attain by my improved filter.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, its construction and operation will now be described in detail, referring to the accompanying drawings, forming a part of this specification, in

' which-- Serial No. 633,7'7l. (No model.)

bodied I provide two threaded nuts A'and B, which have formed therewith the flanges O and D, respectively, and these flanges are scalloped, as clearly shown in Fig.2, and so arranged that the scalloped ends may be over and under turned and clenched upon the flared mouth of the filtering-bag, as indicated at E, and to further secure this mouth against withdrawal compressible washers F are placed upon each side thereof and recesses Gformed in the flanges, so that when the scalloped ends are under and over turned they will force both the washers and mouth of the bag into conformity with these recesses. The bottom of the bag has two rings H and H secured thereto by a rivet I passed through eyes formed in the rings, and this arrangement will permit one of the rings at all times to be within the bag, so that when the bag is to be reversed it is only necessary to engage the inner ring by means of the hooked end of the rod J, (shown in Fig. 4,) and draw the bag inside outward until passing it through the nuts, when the passage-ring will be the inside ring and the device will, after cleaning off impurities, be ready for use with a new surface presented for filtration.

In practice one of the nuts is screwed upon the end of a faucet, and after a certain amount of Water has passed through the fil teringebag a deposit of foreign matter, as before set forth, will accumulate upon the inner surfaces of the bag, and thereafter this deposit will serve as a filtering agent and extract from the water passing therethrough all impurities held in mechanical suspension, as well as neutralizing and absorbing the major parts of the chemical impurities and diseased germs which may be contained therein. After the deposit of foreign matter has reached such a point as to clog the further passage of the water the filtering bag is reversed,as before described, the outside rinsed or otherwise cleansed, when by attaching the opposite nut to the faucet a new filtering-surface is presented which will act in the same manner as just set forth.

If desired, the filtering-bag may be scal loped in cross-section, as shown in Fig. 3, and for some purposes this is advantageous, since it will present a greater surface as a filtering medium with a funnel; but it is obvious that the exact shape, size, or design of the filtering-bag is immaterial, the only essential being that it be of sufficient size to accomplish the result desired, and in practice it is pref-' of clay and other material that require great dilution, washing, and the water again abstracted to a nicety of plasticity or other use, in such cases large stop -oocl s with bags graduated in fineness consistent with the purpose would be needed for the prevention of incrustration and mud in steam-boilerscmy filter would be an applicable economy; also in many other manufacturing and chemical processes this improvement would be eminently serviceable. In some cases the deposit would be the object of filtration.

Having thus fully described my invention, what I claim as new and useful is? 1. In combination, twonuts threaded to run upon a faucet,said nuts having flanges formed therewith having scalloped edges, a filteringbag having a flared mouth clamped between the flanges of the nuts by the overturning and underturning of the ends of the scallops, substantially as described.

2. The combination of two nuts, scalloped edges formed therewith, a filtering-bag, the mouth of which is clamped between the flanges of the nuts, substantially as described. I

3. In combinatiomthe nuts A and B adapted to run upon a faucet, flanges formed with said nuts,washers interposed between said flanges, a filtering-bag having a flared mouth which latter is clamped between the washers, and two rings for reversing the bags, substantially as shown and described.

4. The herein-described combination of two nuts, scalloped flanges formed therewith, a filtering-bag, the mouth of which is clamped 2 between said flanges, washers for preventing chafing or leakage between the faucet-mouth of the bagand flanges, two rings for reversing fixed my signature in the presence of two subscribing witnesses.

RONALD J. ROBERTSON.

lVit-nesses:

JAMES A. Oourrs, MARGARET E. Conr'rs. 

